Tomato - Knowledgebase Question

There are several reasons why your tomatoes are failing to set fruit; Excessive Nitrogen--Anything that creates lush vine conditions usually discourages bloom set. Dry windy conditions can also affect fruit set, as can extreme fluctuations in temperatures. If night temperatures fall below 55 or rise above 75 or if the day temps are above 90, the pollen becomes tacky and non-viable. Pollination cannot occur. If the bloom isn't pollinated, the bloom dies and falls off. Some recommend attempting hand-pollination with an artist brush or a gentle shaking of the plant/cage/support prior to the hottest part of the day. These measures might help but fruit will set when the plants are ready! Eventually you'll get lots of tomatoes. Enjoy!